Springbok coach Jacques Nienaber has made three changes to his starting team for Saturday's final Test against the British & Irish Lions at Cape Town Stadium.
Two of those are personnel changes and one a positional switch, mainly due to injuries to influential flanker Pieter-Steph du Toit and scrumhalf Faf de Klerk.
Centre Damian de Allende will also become the third Springbok in the series to reach the career milestone of 50 Test caps.
With Du Toit, the World Rugby Player of the Year in 2019, having taken a knock to the shoulder in the second Test last weekend, Franco Mostert moves from lock to the side of the scrum, while Lood de Jager is promoted from the bench to the starting team and will start alongside Eben Etzebeth in the second row.
The other change is at scrumhalf, where Cobus Reinach replaces De Klerk, who has been ruled out due to a muscle strain in his leg.
Nienaber opted to name three backs on the bench, with Morne Steyn (flyhalf) joining Herschel Jantjies (scrumhalf) and Damian Willemse (utility back).
Should Steyn take to the field, it would mark a significant occasion for the player, as it would officially see him participate in back-to-back Lions series tournaments. He kicked the penalty goal that sealed the series victory in 2009, while it would also see Steyn make a return to Test rugby for the first time in five years, after last playing against New Zealand in 2016.
"This is a massive Test for us with the Lions series on the line, so it was important for us to maintain consistency in selection following on last week’s performance," said Nienaber.
"Pieter-Steph du Toit was ruled out due to the shoulder injury he suffered last week, but we are fortunate to have experienced players such as Franco and Lood who can step in and who have the physical presence we need in those roles.
"Cobus is also an experienced player with a calm head and who can handle pressure, and we believe he will be able to dictate play well alongside Handré Pollard, while Herschel Jantjies has been great in adding the necessary spark we need off the bench, and will be asked to fulfil that role again."
Nienaber was thrilled to see midfielder De Allende, who made his Test debut against Argentina in 2014, reach this significant career milestone and said: 'It doesn't get any bigger than earning a 50th Test cap in a series decider against the British & Irish Lions.
"We are excited for Damian and we know what it will mean to him and the team to win this match. He has been a key figure in the Bok team in the last few seasons and it gives us great pride to see him achieve this feat."
Nienaber was also pleased to see Steyn back in the Bok jersey for the first time in years.
"I am delighted for Morne - he is a world class player and his work ethic and positive attitude on and off the field since joining the team in Bloemfontein has been impressive," said the Bok coach.
"He can also perform under extreme pressure, as he shown for the Springboks and the Bulls, and that skill will be invaluable in such a vital Test."
???? BREAKING: The Springbok team for the #CastleLionsSeries decider— Springboks (@Springboks) August 3, 2021
?? 50 up for De Allende as Reinach and Steyn are called up
??? "It was important to maintain consistency in selection"
?? Team announcement: https://t.co/gD3tFd82dZ#StrongerTogether #StrongerForever pic.twitter.com/WO8J8Me8jw
Looking forward to the match, Nienaber said he was expecting an epic battle and that the Boks were ready to give everything to win the series.
"This group of players are among a handful of players in the history of South African rugby that have an opportunity to clinch a series against the Lions after winning the Rugby World Cup, and every player in this squad understands what a rare honour that is," said Nienaber.
"I don't think one needs any more motivation than that to win this weekend. We are preparing for a physical encounter and we know that every small battle will count if we want to win the series.
"This match is as important to us as it is for the Lions, so we know it is going to be tight, and we will have to capitalise on every opportunity we have to score points, and be effective in every area of our game.
"As Springboks, big moments such as these excite us, so we plan to go out there and give everything we have to clinch the series."
Mathieu Raynal (France) will referee the match, with Ben O’Keeffe (New Zealand) and Nic Berry (Australia) serving as assistant referees, while Marius Jonker (South Africa) will be the television match official.
Kick-off is at 18:00 on Saturday.
15 Willie le Roux, 14 Cheslin Kolbe, 13 Lukhanyo Am, 12 Damian de Allende, 11 Makazole Mapimpi, 10 Handre Pollard, 9 Cobus Reinach, 8 Jasper Wiese, 7 Franco Mostert, 6 Siya Kolisi (captain), 5 Lood de Jager, 4 Eben Etzebeth, 3 Frans Malherbe, 2 Bongi Mbonambi, 1 Steven Kitshoff
Substitutes: 16 Malcolm Marx, 17 Trevor Nyakane, 18 Vincent Koch, 19 Marco van Staden, 20 Kwagga Smith, 21 Herschel Jantjies, 22 Morne Steyn, 23 Damian Willemse
British & Irish Lions
15 Liam Williams (Wales), 14 Josh Adams (Wales), 13 Robbie Henshaw (Ireland), 12 Bundee Aki (Ireland), 11 Duhan van der Merwe (Scotland), 10 Dan Biggar (Wales), 9 Ali Price (Scotland), 8 Jack Conan (Ireland), 7 Tom Curry (England), 6 Courtney Lawes (England), 5 Alun Wyn Jones (captain, Wales), 4 Maro Itoje (England), 3 Tadhg Furlong (Ireland), 2 Ken Owens (Wales), 1 Wyn Jones (Wales)
Substitutes: 16. Luke Cowan-Dickie (England), 17 Mako Vunipola (Saracens, England), 18 Kyle Sinckler (England - subject to outcome of disciplinary hearing), 19 Adam Beard (Wales), 20 Sam Simmonds (England), 21 Conor Murray (Ireland), 22 Finn Russell (Scotland), 23 Elliot Daly (England)